Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userNew Data from SND Detector in Novosibirsk
56
0
0.0
(
0
)
Ask ChatGPT about the research
No Arabic abstract
The current status of experiments with SND detector at VEPP-2M e^+e^- collider in the energy range 2E_0=400-1400 MeV and recent results of data analysis for $phi$, $omega$ and $rho$ decays and e^+e^- annihilation into hadrons are presented.
rate research
Read More
The processes $e^+e^-tomu^+mu^-$ and $e^+e^-topi^+pi^-$ have been studied with SND detector at VEPP-2M $e^+e^-$ collider in the vicinity of $phi(1020)$ resonance. The branching ratios $B(phitomu^+mu^-)=(3.30pm 0.45pm 0.32)times 10^{-4}$ and $B(phitopi^+pi^-)=(0.71pm 0.11pm 0.09)times 10^{-4}$ were obtained.
The review of experimental results obtained with SND detector at VEPP-2M $e^+e^-$ collider in the energy region $sqrt[]{s}=0.36$ -- 1.38 GeV is given. The presented results include the following items: studies of the light vector mesons radiative decays, OZI-rule and G-parity suppressed $phi$-meson rare decays, $phi$-meson parameters measurements, studies of $e^+e^-topi^+pi^-pi^0$ process dynamics, $eta$ and $K_S$ mesons rare decays, $eta$ and $phi$ mesons conversion decays, and study of the $e^+e^-$ annihilation into hadrons.
The current status of experiments with SND detector at VEPP-2M $e^+e^-$ collider in the energy range $2E_0=0.4-1.4$ GeV is given. The new results of analysis of $phi$ decay into $pi^0pi^0gamma$, $etapi^0gamma$ are based on the full SND statistics corresponding 20 million of $phi$ decay. New measurement of $omegatopi^0pi^0gamma$ decay and a first observation of $rhotopi^0pi^0gamma$ are presented. The accuracy of many other rare decays of light vector mesons was improved. In the energy range $2E_0=1.0div1.4$ GeV the cross sections of the processes $e^+e^-toomegapi^0$ and $e^+e^-topi^+pi^-pi^0$ were measured. The results of the fitting of data are discussed.
The paper describes experiments with the SND detector at VEPP-2M collider, carried out during the period from October 1995 until June 1997. The total integrated luminosity of 6.4 pb^{-1} was collected in the energy range 2E=0.4-1.4 GeV (MHAD97 experiment), corresponding to 4*10^5 mu^+ mu^- pairs produced. Preliminary results of the 1996 phi-meson experiment (FI96) are presented. The total number of phi-mesons produced is 4*10^6. New data on rare decays of phi and eta (550) mesons, in particular B(phi -> eta gamma) = (1.30+-0.06+-0.07)%, B(phi -> pi^0 pi^0 gamma) = (1.1+-0.2)*10^{-4}, (M_{pi^0 pi^0} > 800 MeV), B(phi -> f^0 gamma) = (4.7+-1.0)*10^{-4}, B(phi -> eta pi^0 gamma) = (1.3+-0.5)*10^{-4}, B(phi -> eta gamma) < 1.7*10^{-4}, B(phi -> 2 pi^0 ) < 6*10^{-4} were obtained.
Short overview of experiments with SND detector at VEPP-2M e^+e^- collider in the energy range 2E = 400 - 1400 MeV and preliminary results of data analysis are presented.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
